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TLMapView.m
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//
// TLMapView.m
// Mercatalog
//
// Created by Nathan Vander Wilt on 2/25/08.
// Copyright 2008 Calf Trail Software, LLC. All rights reserved.
//
#import "TLMapView.h"
#import "TLMapView+HostInternals.h"
#import "TLTrackingManager.h"
#import <QuartzCore/QuartzCore.h>
#import "TLCocoaToolbag.h"
#include "TLGeometry.h"
#include "TLProjectionInfo.h"
#import "TLMapLayer.h"
#import "TLInteractiveMapLayer.h"
#import "TLMapLayer+HostInternals.h"
@interface TLMapView ()
- (void)setMapLayersNeedDisplay;
- (CGAffineTransform)transformFromMapToBackingLayer;
- (CGAffineTransform)transformFromMapToView;
- (CGSize)screenPixelsPerMillimeter;
- (void)invalidateDisplaySizeCache;
@property (nonatomic, retain) NSEvent* eventForDrag;
+ (TLCoordinate)defaultCenterCoordinate;
+ (TLProjectionRef)createDefaultProjectionWithCenter:(TLCoordinate)centerCoord;
+ (TLBounds)defaultBoundsForProjection:(TLProjectionRef)proj;
@end
@implementation TLMapView
#pragma mark Lifecycle
- (void)awakeFromNib {
// Set up layer-hosting
[self setLayer:[rootLayer autorelease]];
[self setWantsLayer:YES];
[rootLayer setLayoutManager:self];
}
- (id)initWithFrame:(NSRect)frame {
self = [super initWithFrame:frame];
if (self) {
rootLayer = [[CALayer layer] retain]; // autoreleased in awakeFromNib
[rootLayer setDelegate:self];
mapLayers = [[NSMutableArray array] retain];
mapLayerBackingInfo = [[NSMapTable mapTableWithStrongToStrongObjects] retain];
layerTrackingManagers = [[NSMapTable mapTableWithStrongToStrongObjects] retain];
TLCoordinate defaultCenter = [[self class] defaultCenterCoordinate];
projection = [[self class] createDefaultProjectionWithCenter:defaultCenter];
desiredBounds = [[self class] defaultBoundsForProjection:projection];
}
return self;
}
- (void)dealloc {
[[NSNotificationCenter defaultCenter] removeObserver:self];
TLProjectionRelease(projection);
[mapLayers release];
[layerTrackingManagers release];
[super dealloc];
}
#pragma mark Defaults
+ (TLCoordinate)defaultCenterCoordinate {
return TLCoordinateMake(0.0, 10.0);
}
+ (TLProjectionRef)createDefaultProjectionWithCenter:(TLCoordinate)centerCoord {
TLProjectionName worldName = TLProjectionNameRobinson;
TLProjectionGeoidRef worldGeoid = TLProjectionGeoidWGS84;
TLMutableProjectionParametersRef worldParams = TLProjectionParametersCreateMutable();
TLProjectionParametersSetLatitudeOfOrigin(worldParams, centerCoord.lat);
TLProjectionParametersSetLongitudeOfOrigin(worldParams, centerCoord.lon);
TLProjectionError err = TLProjectionErrorNone;
TLProjectionRef proj = TLProjectionCreate(worldName, worldGeoid, worldParams, &err);
TLProjectionParametersRelease(worldParams);
if (err && proj) {
TLProjectionRelease(proj);
proj = NULL;
}
return proj;
}
+ (TLBounds)defaultBoundsForProjection:(TLProjectionRef)proj {
return TLProjectionInfoDefaultBounds(proj);
}
#pragma mark Accessors
@synthesize eventForDrag;
- (void)setProjection:(TLProjectionRef)newMapProjection {
if (newMapProjection == projection) return;
TLProjectionRelease(projection);
projection = TLProjectionCopy(newMapProjection);
[self setMapLayersNeedDisplay];
}
- (TLBounds)desiredBounds {
return desiredBounds;
}
- (void)setDesiredBounds:(TLBounds)newDesiredBounds {
desiredBounds = newDesiredBounds;
[self setMapLayersNeedDisplay];
}
- (id < TLMapInfo >)currentMapInfo {
return self;
}
#pragma mark Map info accessors
- (TLProjectionRef)projection {
return projection;
}
- (TLBounds)visibleBounds {
CGAffineTransform viewToMap = CGAffineTransformInvert([self transformFromMapToView]);
return CGRectApplyAffineTransform(NSRectToCGRect([self bounds]), viewToMap);
}
- (CGSize)millimeterSize {
CGFloat userScale = [[self window] userSpaceScaleFactor];
CGSize unscaledMillimeterSize = [self unscaledMillimeterSize];
return CGSizeMake(unscaledMillimeterSize.width * userScale,
unscaledMillimeterSize.height * userScale);
}
- (CGSize)unscaledMillimeterSize {
CGSize mapUnitSize = CGSizeMake(1.0f, 1.0f);
CGAffineTransform mapToBackingLayer = [self transformFromMapToBackingLayer];
CGSize pixelsPerUnit = CGSizeApplyAffineTransform(mapUnitSize, mapToBackingLayer);
CGSize pixelsPerMillimeter = [self screenPixelsPerMillimeter];
double unitsPerMillimeterWidth = pixelsPerMillimeter.width / pixelsPerUnit.width;
double unitsPerMillimeterHeight = pixelsPerMillimeter.height / pixelsPerUnit.height;
return CGSizeMake((CGFloat)unitsPerMillimeterWidth, (CGFloat)unitsPerMillimeterHeight);
}
- (CGSize)significantVisualSize {
NSSize basePixelSize = NSMakeSize(1.0f, 1.0f);
CGSize viewPixelSize = NSSizeToCGSize([self convertSizeFromBase:basePixelSize]);
CGAffineTransform viewToMap = CGAffineTransformInvert([self transformFromMapToView]);
return CGSizeApplyAffineTransform(viewPixelSize, viewToMap);
}
- (CGSize)significantInteractiveSize {
return [self significantVisualSize];
}
- (CGPoint)convertWindowPointToMap:(NSPoint)windowPoint {
NSPoint pointInView = [self convertPoint:windowPoint fromView:nil];
CGAffineTransform viewToMap = CGAffineTransformInvert([self transformFromMapToView]);
return CGPointApplyAffineTransform(NSPointToCGPoint(pointInView), viewToMap);
}
- (NSPoint)convertMapPointToWindow:(CGPoint)mapPoint {
CGPoint pointInView = CGPointApplyAffineTransform(mapPoint, [self transformFromMapToView]);
return [self convertPoint:NSPointFromCGPoint(pointInView) toView:nil];
}
#pragma mark Notification handling
- (void)viewWillMoveToWindow:(NSWindow*)newWindow {
NSWindow* oldWindow = [self window];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:NSWindowDidChangeScreenNotification
object:oldWindow];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(windowScreenChanged:)
name:NSWindowDidChangeScreenNotification
object:newWindow];
[self invalidateDisplaySizeCache];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:NSWindowDidBecomeKeyNotification
object:oldWindow];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(updateActive:)
name:NSWindowDidBecomeKeyNotification
object:newWindow];
[[NSNotificationCenter defaultCenter] removeObserver:self
name:NSWindowDidResignKeyNotification
object:oldWindow];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(updateActive:)
name:NSWindowDidResignKeyNotification
object:newWindow];
}
- (void)windowScreenChanged:(NSNotification*)notification {
(void)notification;
[self invalidateDisplaySizeCache];
[self setMapLayersNeedDisplay];
}
- (void)updateActive:(NSNotification*)notification {
(void)notification;
BOOL isActive = ([[self window] isKeyWindow] && [[self window] firstResponder] == self);
for (TLMapLayer* layer in mapLayers) {
[layer setActive:isActive];
}
}
- (BOOL)becomeFirstResponder {
[self updateActive:nil];
return YES;
}
- (BOOL)resignFirstResponder {
[self performSelector:@selector(updateActive:) withObject:nil afterDelay:0.0];
return YES;
}
- (BOOL)acceptsFirstResponder {
return YES;
}
#pragma mark Coordinate transform helpers
- (CGAffineTransform)transformFromMapToBackingLayer {
CGRect mapLayerBounds = [rootLayer bounds];
return TLTransformFromRectToRect(desiredBounds, mapLayerBounds, TLAspectPadToFit);
}
- (CGAffineTransform)transformFromMapToView {
return TLTransformFromRectToRect(desiredBounds, NSRectToCGRect([self bounds]), TLAspectPadToFit);
}
- (CGSize)screenPixelsPerMillimeter {
/* NOTE: TLScreenPixelsPerMillimeter() is an expensive function, so we prefer to use a cached result */
if (CGSizeEqualToSize(cachedScreenSizeInMillimeters, CGSizeZero)) {
cachedScreenSizeInMillimeters = TLScreenPixelsPerMillimeter([[self window] screen]);
}
return cachedScreenSizeInMillimeters;
}
- (void)invalidateDisplaySizeCache {
cachedScreenSizeInMillimeters = CGSizeZero;
}
#pragma mark Backing layer management
- (CALayer*)backingLayerForMapLayer:(TLMapLayer*)mapLayer {
return [mapLayerBackingInfo objectForKey:mapLayer];
}
- (TLMapLayer*)mapLayerForBackingLayer:(CALayer*)layer {
return [mapLayerBackingInfo objectForKey:layer];
}
- (void)layoutSublayersOfLayer:(CALayer*)layer {
//printf("layoutSublayersOfLayer: %p\n", layer);
if (layer == rootLayer) {
for (CALayer* sublayer in [layer sublayers]) {
[sublayer setFrame:[layer frame]];
}
}
}
- (void)setMapLayersNeedDisplay {
for (TLMapLayer* mapLayer in mapLayers) {
[self setLayerNeedsDisplay:mapLayer];
}
}
- (CALayer*)makeBackingLayerForLayer:(TLMapLayer*)mapLayer {
CALayer* maplayerBacking = [CALayer layer];
[maplayerBacking setDelegate:self];
[maplayerBacking setNeedsDisplayOnBoundsChange:YES];
[maplayerBacking setNeedsDisplay];
[mapLayerBackingInfo setObject:maplayerBacking forKey:mapLayer];
[mapLayerBackingInfo setObject:mapLayer forKey:maplayerBacking];
return maplayerBacking;
}
- (void)observeValueForKeyPath:(NSString*)keyPath
ofObject:(id)object
change:(NSDictionary*)change
context:(void*)context
{
(void)context;
if ([keyPath isEqualToString:@"hidden"]) {
TLMapLayer* mapLayer = (TLMapLayer*)object;
NSNumber* newHidden = [change objectForKey:NSKeyValueChangeNewKey];
NSAssert(newHidden, @"Layer value observation improperly configured");
CALayer* backingLayer = [self backingLayerForMapLayer:mapLayer];
[backingLayer setHidden:[newHidden boolValue]];
}
}
- (void)registerLayerHosting:(TLMapLayer*)layer {
[layer setHost:self];
NSKeyValueObservingOptions kvoOptions= (NSKeyValueObservingOptionInitial | NSKeyValueObservingOptionNew);
[layer addObserver:self forKeyPath:@"hidden" options:kvoOptions context:NULL];
if ([layer isKindOfClass:[TLInteractiveMapLayer class]]) {
[self updateDragTypesForLayer:(TLInteractiveMapLayer*)layer];
}
}
- (void)unregisterLayerHosting:(TLMapLayer*)layer {
[layer setHost:nil];
[layer removeObserver:self forKeyPath:@"hidden"];
TLTrackingManager* layerTrackingManager = [layerTrackingManagers objectForKey:layer];
if (layerTrackingManager) {
[layerTrackingManagers removeObjectForKey:layer];
[layerTrackingManagers removeObjectForKey:layerTrackingManager];
}
if ([layer isKindOfClass:[TLInteractiveMapLayer class]]) {
[self updateDragTypesForLayer:nil];
}
}
- (void)insertLayer:(TLMapLayer*)layer atIndex:(NSUInteger)idx {
if ([layer host] == self) {
// adjust idx if layer will be removed from beneath
NSUInteger prevIdx = [mapLayers indexOfObjectIdenticalTo:layer];
if (idx > prevIdx) {
idx -= 1;
}
}
[[[layer retain] autorelease] removeFromHost];
[mapLayers insertObject:layer atIndex:idx];
CALayer* mapLayerBacking = [self makeBackingLayerForLayer:layer];
[rootLayer insertSublayer:mapLayerBacking atIndex:(unsigned)idx];
[self registerLayerHosting:layer];
}
- (void)replaceLayer:(TLMapLayer*)oldLayer withLayer:(TLMapLayer*)newLayer {
CALayer* oldMapLayerBacking = [self backingLayerForMapLayer:oldLayer];
NSAssert(oldMapLayerBacking, @"Replaced layer must exist");
CALayer* newMapLayerBacking = [self makeBackingLayerForLayer:newLayer];
[rootLayer replaceSublayer:oldMapLayerBacking with:newMapLayerBacking];
NSUInteger oldMapLayerIndex = [mapLayers indexOfObjectIdenticalTo:oldLayer];
[mapLayers replaceObjectAtIndex:oldMapLayerIndex withObject:newLayer];
[self unregisterLayerHosting:oldLayer];
[self registerLayerHosting:newLayer];
}
- (void)mainRemoveLayer:(TLMapLayer*)layer {
[self unregisterLayerHosting:layer];
CALayer* layerBacking = [self backingLayerForMapLayer:layer];
[layerBacking removeFromSuperlayer];
[mapLayerBackingInfo removeObjectForKey:layer];
[mapLayerBackingInfo removeObjectForKey:layerBacking];
[mapLayers removeObject:layer];
}
- (void)insertLayer:(TLMapLayer*)layer aboveLayer:(TLMapLayer*)existingLayer {
NSUInteger existingIndex = [mapLayers indexOfObjectIdenticalTo:existingLayer];
NSAssert(existingIndex != NSNotFound, @"Reference layer must exist");
[self insertLayer:layer atIndex:(existingIndex+1)];
}
- (void)insertLayer:(TLMapLayer*)layer belowLayer:(TLMapLayer*)existingLayer {
NSUInteger existingIndex = [mapLayers indexOfObjectIdenticalTo:existingLayer];
NSAssert(existingIndex != NSNotFound, @"Reference layer must exist");
[self insertLayer:layer atIndex:existingIndex];
}
- (void)addLayer:(TLMapLayer*)layer {
[self insertLayer:layer atIndex:[mapLayers count]];
}
- (id < CAAction >)actionForLayer:(CALayer*)layer forKey:(NSString*)key {
(void)layer;
/* NOTE: implementing this method seems to *add* a fade transition effect
on the @"contents" key that is otherwise not present in redraws. (Not sure
why.) We explicitly block it for now, though it may be desirable. */
if ([key isEqualToString:@"bounds"] ||
[key isEqualToString:@"position"] ||
[key isEqualToString:@"contents"])
{
// don't animate frame change
return (id < CAAction >)[NSNull null];
}
else return nil;
}
#pragma mark Drawing
- (void)drawLayer:(CALayer*)backingLayer inContext:(CGContextRef)ctx {
TLMapLayer* mapLayer = [self mapLayerForBackingLayer:backingLayer];
// set context's transformation matrix so that projected points fall in view
CGContextSaveGState(ctx);
CGAffineTransform mapToLayer = [self transformFromMapToBackingLayer];
CGContextConcatCTM(ctx, mapToLayer);
id < TLMapInfo > mapInfo = [self currentMapInfo];
[mapLayer drawInContext:ctx withInfo:mapInfo];
CGContextRestoreGState(ctx);
}
#pragma mark Mouse dispatch
- (TLInteractiveMapLayer*)layerHitByEvent:(NSEvent*)mouseEvent withInfo:(id < TLMapInfo >)mapInfo {
BOOL scrollEvent = ([mouseEvent type] == NSScrollWheel);
TLInteractiveMapLayer* hitLayer = nil;
NSPoint mouseInWindow = [mouseEvent locationInWindow];
for (TLMapLayer* layer in [mapLayers reverseObjectEnumerator]) {
if ([layer isKindOfClass:[TLInteractiveMapLayer class]]) {
TLInteractiveMapLayer* interactiveLayer = (TLInteractiveMapLayer*)layer;
BOOL layerHit = (scrollEvent ?
[interactiveLayer wantsScrollEvents] :
[interactiveLayer hitTest:mouseInWindow withEvent:mouseEvent withInfo:mapInfo]);
if (layerHit) {
hitLayer = interactiveLayer;
break;
}
}
}
return hitLayer;
}
- (void)mouseDown:(NSEvent*)mouseEvent {
[self setEventForDrag:mouseEvent];
id < TLMapInfo > mapInfo = [self currentMapInfo];
currentMouseLayer = [self layerHitByEvent:mouseEvent withInfo:mapInfo];
[currentMouseLayer mouseDown:mapInfo withEvent:mouseEvent];
}
- (void)mouseDragged:(NSEvent*)mouseEvent {
id < TLMapInfo > mapInfo = [self currentMapInfo];
[currentMouseLayer mouseDragged:mapInfo withEvent:mouseEvent];
}
- (void)mouseUp:(NSEvent*)mouseEvent {
[self setEventForDrag:nil];
id < TLMapInfo > mapInfo = [self currentMapInfo];
[currentMouseLayer mouseUp:mapInfo withEvent:mouseEvent];
currentMouseLayer = nil;
}
- (void)flagsChanged:(NSEvent*)event {
id < TLMapInfo > mapInfo = [self currentMapInfo];
[currentMouseLayer flagsChanged:mapInfo withEvent:event];
}
- (void)scrollWheel:(NSEvent*)mouseEvent {
id < TLMapInfo > mapInfo = [self currentMapInfo];
TLInteractiveMapLayer* hitLayer = [self layerHitByEvent:mouseEvent withInfo:mapInfo];
[hitLayer scrollWheel:mapInfo withEvent:mouseEvent];
}
-(void)magnifyWithEvent:(NSEvent *)gestureEvent {
(void)gestureEvent;
/* see http://www.cocoadev.com/index.pl?MultiTouchTrackpad and
http://cocoadex.com/2008/02/nsevent-modifications-swipe-ro.html */
}
#pragma mark Layer drag destination handling
- (NSDragOperation)draggingEntered:(id < NSDraggingInfo >)sender {
if (currentMouseLayer) {
// skip search below if the mouse is re-entering in the same session
id < TLMapInfo > mapInfo= [self currentMapInfo];
return [currentMouseLayer draggingEntered:sender withInfo:mapInfo];
}
// topmost layer with type matching pasteboard will handle this drop
NSPasteboard* dragPasteboard = [sender draggingPasteboard];
NSEnumerator* layerEnum = [mapLayers reverseObjectEnumerator];
TLInteractiveMapLayer* targetLayer = nil;
for (TLMapLayer* mapLayer in layerEnum) {
if (![mapLayer isKindOfClass:[TLInteractiveMapLayer class]]) continue;
TLInteractiveMapLayer* interactiveLayer = (TLInteractiveMapLayer*)mapLayer;
NSArray* layerTypes = [interactiveLayer registeredDragTypes];
if ([dragPasteboard availableTypeFromArray:layerTypes]) {
targetLayer = interactiveLayer;
break;
}
}
currentMouseLayer = targetLayer;
id < TLMapInfo > mapInfo= [self currentMapInfo];
return [currentMouseLayer draggingEntered:sender withInfo:mapInfo];
}
- (BOOL)wantsPeriodicDraggingUpdates {
// note that this returns NO if dragDestinationLayer is nil
id < TLMapInfo > mapInfo= [self currentMapInfo];
return [currentMouseLayer wantsPeriodicDraggingUpdates:mapInfo];
}
- (NSDragOperation)draggingUpdated:(id < NSDraggingInfo >)sender {
id < TLMapInfo > mapInfo= [self currentMapInfo];
// returns NSDragOperationNone if no destination layer
return [currentMouseLayer draggingUpdated:sender withInfo:mapInfo];
}
- (void)draggingExited:(id < NSDraggingInfo >)sender {
/* NOTE: this method is not called just when the mouse leaves, but essentially,
whenever performDragOperation will not be called instead. */
id < TLMapInfo > mapInfo= [self currentMapInfo];
[currentMouseLayer draggingExited:sender withInfo:mapInfo];
}
- (BOOL)prepareForDragOperation:(id < NSDraggingInfo >)sender {
id < TLMapInfo > mapInfo= [self currentMapInfo];
// returns NO if no destination layer
return [currentMouseLayer prepareForDropOperation:sender withInfo:mapInfo];
}
- (BOOL)performDragOperation:(id < NSDraggingInfo >)sender {
id < TLMapInfo > mapInfo= [self currentMapInfo];
// return NO if no destination layer
return [currentMouseLayer performDropOperation:sender withInfo:mapInfo];
}
- (void)concludeDragOperation:(id < NSDraggingInfo >)sender {
id < TLMapInfo > mapInfo= [self currentMapInfo];
[currentMouseLayer concludeDropOperation:sender withInfo:mapInfo];
}
- (void)draggingEnded:(id < NSDraggingInfo >)sender {
/* NOTE: The Leopard release notes indicate this is implemented despite other
documentation to the contrary. Testing on 10.5.4, this message is always received
for every drag session initiated via draggingEntered:, and is always the last
message received. See rdar://6250983 for notes about this documentation discrepancy.
Given this behaviour, this is the only place we should unset dragDestinationLayer. */
id < TLMapInfo > mapInfo= [self currentMapInfo];
[currentMouseLayer draggingEnded:sender withInfo:mapInfo];
currentMouseLayer = nil;
}
@end
@implementation TLMapView (TLMapViewHostInternals)
- (void)removeLayer:(TLMapLayer*)layer {
[self mainRemoveLayer:layer];
}
- (void)setLayerNeedsDisplay:(TLMapLayer*)layer {
CALayer* backingLayer = [self backingLayerForMapLayer:layer];
[backingLayer setNeedsDisplay];
}
#pragma mark Track zone management
- (void)trackingManager:(TLTrackingManager*)manager
replaceTrackingAreas:(NSArray*)oldTrackingAreas
withTrackingAreas:(NSArray*)newTrackingAreas
{
(void)manager;
// NOTE: this is to try work around cursor reset issues when adding trackingAreas
[[NSCursor currentCursor] push];
for (NSTrackingArea* oldArea in oldTrackingAreas) {
[self removeTrackingArea:oldArea];
}
for (NSTrackingArea* newArea in newTrackingAreas) {
[self addTrackingArea:newArea];
}
[NSCursor pop];
}
- (void)trackingManager:(TLTrackingManager*)manager
mouseDidEnterZone:(TLTrackingZone*)trackZone
withEvent:(NSEvent*)eventOrNil
{
TLInteractiveMapLayer* layer = [layerTrackingManagers objectForKey:manager];
[layer mouseEntered:[self currentMapInfo] trackingZone:trackZone withEvent:eventOrNil];
}
/*
- (void)trackingManager:(TLTrackingManager*)manager
mouseDidMoveInZone:(TLTrackingZone*)trackZone
withEvent:(NSEvent*)eventOrNil
{
TLInteractiveMapLayer* layer = [layerTrackingManagers objectForKey:manager];
[layer mouseMoved:[self currentMapInfo] trackingZone:trackZone withEvent:eventOrNil];
}
*/
- (void)trackingManager:(TLTrackingManager*)manager
mouseDidExitZone:(TLTrackingZone*)trackZone
withEvent:(NSEvent*)eventOrNil
{
TLInteractiveMapLayer* layer = [layerTrackingManagers objectForKey:manager];
[layer mouseExited:[self currentMapInfo] trackingZone:trackZone withEvent:eventOrNil];
}
- (BOOL)trackingManager:(TLTrackingManager*)manager
shouldUsePoint:(CGPoint*)zonePointPtr
forWindowPoint:(NSPoint)windowPoint
{
(void)manager;
CGAffineTransform viewToMap = CGAffineTransformInvert([self transformFromMapToView]);
NSPoint viewPoint = [self convertPoint:windowPoint fromView:nil];
*zonePointPtr = CGPointApplyAffineTransform(NSPointToCGPoint(viewPoint), viewToMap);
return YES;
}
- (BOOL)trackingManager:(TLTrackingManager*)manager
shouldUseWindowPoint:(NSPoint*)windowPointPtr
{
(void)manager;
*windowPointPtr = [[self window] mouseLocationOutsideOfEventStream];
return YES;
}
- (NSRect)trackingManager:(TLTrackingManager*)manager
clippedRectForBounds:(CGRect)zoneBounds
{
(void)manager;
CGAffineTransform mapToView = [self transformFromMapToView];
CGRect boundsInView = CGRectApplyAffineTransform(zoneBounds, mapToView);
return NSIntersectionRect(NSRectFromCGRect(boundsInView), [self bounds]);
}
- (NSArray*)activeTrackingZonesForLayer:(TLInteractiveMapLayer*)layer {
return [layerTrackingManagers objectForKey:layer];
}
- (void)setActiveTrackingZones:(NSArray*)trackingZones forLayer:(TLInteractiveMapLayer*)layer {
TLTrackingManager* layerManager = [layerTrackingManagers objectForKey:layer];
if (!layerManager) {
layerManager = [[TLTrackingManager new] autorelease];
[layerManager setDelegate:self];
[layerTrackingManagers setObject:layerManager forKey:layer];
[layerTrackingManagers setObject:layer forKey:layerManager];
}
[layerManager setActiveTrackingZones:trackingZones];
}
#pragma mark Layer drag destination
- (void)updateDragTypesForLayer:(TLInteractiveMapLayer*)layer {
(void)layer;
// walk all interactive layers collecting drag types
NSMutableSet* combinedTypes = [NSMutableSet set];
for (TLMapLayer* mapLayer in mapLayers) {
if (![mapLayer isKindOfClass:[TLInteractiveMapLayer class]]) continue;
TLInteractiveMapLayer* interactiveLayer = (TLInteractiveMapLayer*)mapLayer;
NSArray* layerTypes = [interactiveLayer registeredDragTypes];
[combinedTypes addObjectsFromArray:layerTypes];
}
[self unregisterDraggedTypes]; // this may not be necessary?
NSArray* viewDragTypes = [combinedTypes allObjects];
[self registerForDraggedTypes:viewDragTypes];
}
#pragma mark Layer drag source handling
- (NSPasteboard*)dragPasteboardForLayer:(TLInteractiveMapLayer*)layer {
(void)layer;
if (![self eventForDrag]) {
return nil;
}
return [NSPasteboard pasteboardWithName:NSDragPboard];
}
- (void)dragFromLayer:(TLInteractiveMapLayer*)layer
withImage:(CGImageRef)dragImage
anchor:(CGPoint)imagePoint
slideBack:(BOOL)shouldSlideBack
{
NSAssert([self eventForDrag], @"Layer initiated drag at improper time");
NSImage* cocoaImage = TLNSImageFromCGImage(dragImage, TLDragTransparencyDefault);
// calculate image lower-left location in view
NSPoint mouseDownInWindow = [[self eventForDrag] locationInWindow];
NSPoint imageCornerInWindow = NSMakePoint((mouseDownInWindow.x - imagePoint.x),
(mouseDownInWindow.y - imagePoint.y));
NSPoint imageCornerInView = [self convertPoint:imageCornerInWindow fromView:nil];
NSPasteboard* dragPasteboard = [self dragPasteboardForLayer:layer];
[self dragImage:cocoaImage
at:imageCornerInView
offset:NSZeroSize
event:[self eventForDrag]
pasteboard:dragPasteboard
source:layer
slideBack:shouldSlideBack];
}
@end